Bank collapse monitoring is of vital significance as bank collapse is highly concealing and happens in a sudden with great harm. With the development of Unmanned Aerial Vehicle (UAV), multi-beam, three-dimensional laser scanning, aperture radar and other technologies, a modern emergency monitoring system with high spatial-temporal resolution for bank collapse has developed. The system composes amphibious ship-borne high-resolution terrain acquisition, UAV wide-area coastline inspection and danger monitoring, real-aperture radar monitoring and early warning of bank collapse. In this paper, the structures, characteristics, applications, and prospects of each monitoring approach in the system are expounded. Such emergency monitoring technology system makes it possible to quickly and accurately monitor and perceive the development and evolution of dangers, thus offering reliable technical support for the early warning and treatment of bank collapse and subsequent river regulation.